SW6191102_conveyance swale soil infiltration-S_2/15/2020

CONVEYANCE SWALES RETENTION INFILTRATION TIME
McPhail Meadows
OBJECTIVE: Verify that swales below grade at discharge point will drain within 72 hours
SOLUTIONS: Soils infiltration testing (Ksat) and infiltration calculations
TIME TO DRAIN:
Swale(s)
Depth of Swale at Discharge (in)
Ksat
Time to Drain (hrs)
Meets Requirements?
2, 4, S
2
1.0S
1.90
yes
1,3
6
0.20
30.00
yes
6,7
7.8
3.14
2.48
yes
2/15/20
HILLIARD ENGINEERING, PLLC
749 WALKER ROAD
SANFORD, NC 27332
NC LICENSE NO. P-0836